This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom – Quiz 27 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 27 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which subatomic particle does not have an electrical charge and is found inside of the nucleus? A) Electrons. B) Protons. C) Neutrons. D) Isotopes. Show Answer Correct Answer: C) Neutrons. 2. When an atom is chemically stable, how many electrons are in its outer energy level? A) 2 or 8. B) 3 or 6. C) 4 or 8. D) 1 or 2. Show Answer Correct Answer: A) 2 or 8. 3. In 2p$^{3}$ the subshell value is A) 0. B) 1. C) 2. D) 3. Show Answer Correct Answer: B) 1. 4. What does Zeeman effect refer to? A) Splitting in magnetic field. B) Splitting in electric field. C) Transition energy. D) Photon emission. Show Answer Correct Answer: A) Splitting in magnetic field. 5. An orbital can have a maximum of two electrons and these must have opposite spins.above statement may be the conclusion of which law? A) Hund's multiplicity rule. B) Pauli's exclusion principle. C) Aufbau principle. D) N+l rule. Show Answer Correct Answer: B) Pauli's exclusion principle. 6. The isotope used to find out the age of fossils is A) Deuterium. B) Phosphorus-31. C) Carbon-12. D) Carbon-14. Show Answer Correct Answer: D) Carbon-14. 7. Scientist Henrich Geissler in 1857 discovered discharge tube or vacuum tube . His nationality is ..... A) GERMANY. B) AMERICA. C) SPAIN. D) ENGLAND. Show Answer Correct Answer: A) GERMANY. 8. Who discovered the neutron? A) Dalton. B) Chadwick. C) Thomson. D) Bohr. Show Answer Correct Answer: B) Chadwick. 9. What was the name of J.J Thomsons' model of atomic structure. A) Electron Cloud Model. B) Electron Sea Model. C) Water melon Model. D) Bohr Model. Show Answer Correct Answer: C) Water melon Model. 10. Which statement about the atomic nucleus is correct? A) The nucleus is made of protons and neutrons and has a negative charge. B) The nucleus is made of protons and neutrons and has a positive charge. C) The nucleus is made of electrons and has a positive charge. D) The nucleus is made of electrons and has a negative charge. Show Answer Correct Answer: B) The nucleus is made of protons and neutrons and has a positive charge. 11. An ..... is one of two or more different-number-neutron atoms of an element. A) Nucleus. B) Ion. C) Isotopes. D) None of the above. Show Answer Correct Answer: B) Ion. 12. According to which model: ..... An atom consists of a sphere of positive charge with negatively charged electrons embedded in it A) JJ thomson model. B) Rutherford. C) Bohr. D) None. Show Answer Correct Answer: A) JJ thomson model. 13. Isotopes all have the same number of ..... A) Neutrons. B) Protons. C) Atomic Mass. D) Isotope. Show Answer Correct Answer: B) Protons. 14. Select the pair of isotones from following A) $_{18}$Ar$^{40}$, $_{19}$K$^{40}$. B) $_{6}$C$^{14 }$, $_{6}$C$^{12}$. C) $_{6}$C$^{14}$, $_{18}$Ar$^{40}$. D) $_{6}$C$^{14 }$, $_{7}$N$^{15}$. Show Answer Correct Answer: D) $_{6}$C$^{14 }$, $_{7}$N$^{15}$. 15. The percentage of copper and oxygen in samples of "CuO" obtained by different methods were found to be the same. This illustrates the law of: A) Constant proportions. B) Conservation of mass. C) Multiple proportions. D) Reciprocal proportions. Show Answer Correct Answer: A) Constant proportions. 16. Rutherford's experiment on scattering of $\alpha$-particle shows that the atom A) Is positively charged. B) Has a very large nucleus. C) Is negatively charged. D) Has a very small positively charged nucleus at the centre. Show Answer Correct Answer: D) Has a very small positively charged nucleus at the centre. 17. What does the nucleus consist of? A) Protons + Electrons. B) Neutrons + Electrons. C) Atoms. D) Protons + Neutrons. Show Answer Correct Answer: D) Protons + Neutrons. 18. In a sample of ethyl ethanoate (CH$_{3}$COOC$_{2}$H$_{5}$), the two oxygen atoms have the same number of electronsbut different number of neutrons. Which of the following is the correct reason for it? A) One of the oxygen atoms has gained electrons. B) One of the oxygen atoms has gained protons. C) The two oxygen atoms are isotopes. D) The two oxygen atoms are isobars. Show Answer Correct Answer: C) The two oxygen atoms are isotopes. 19. What is the valency and valence electrons of Z= 3? A) 1, 1. B) 2, 1. C) 1, 2. D) 1, 0. Show Answer Correct Answer: A) 1, 1. 20. Identify an element with tendency to gain electrons, having three shells and valency 3 A) Nitrogen. B) Alumimium. C) Boron. D) Phosphorous. Show Answer Correct Answer: D) Phosphorous. 21. The maximum no. of electrons that can be accommodated in the outermost shell of an atom is A) 2. B) 20. C) 8. D) 32. Show Answer Correct Answer: C) 8. 22. Which subatomic particles are correctly paired with their charges? A) Electron-positive, neutron-negative, proton-neutral. B) Electron-negative, neutron-neutral, proton-positive. C) Electron-negative, neutron-positive, proton-neutral. D) Electron-neutral, neutron-positive, proton-negative. Show Answer Correct Answer: B) Electron-negative, neutron-neutral, proton-positive. 23. The electromagnetic spectrum includes the complete range of electromagnetic waves placed in order of: A) Increasing amplitutde. B) Increasing wavelength. C) Increasing frequency. D) None of the above. Show Answer Correct Answer: C) Increasing frequency. 24. Consider the first six energy levels of a hydrogen atom. How many electronic transitions corresponding to the Lyman Series and Balmer series are possible? A) Lyman series = 5; Balmer series = 4. B) Lyman series = 4; Balmer series = 5. C) Lyman series = 3; Balmer series = 4. D) Lyman series = 6; Balmer series = 6. Show Answer Correct Answer: A) Lyman series = 5; Balmer series = 4. 25. An atom that has a positive or negative charge is an ..... A) Nucleus. B) Ion. C) Isotopes. D) None of the above. Show Answer Correct Answer: C) Isotopes. ← PreviousNext →Related QuizzesClass 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 1Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 2Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 3Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 4Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 5Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 6Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 7Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 8Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 9Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books